caa a22 4500 46318713X CHVBK 20180406164857.0 cr unu---uuuuu 170326e20070601xx s 000 0 eng 10.1007/s10472-007-9072-3 doi (NATIONALLICENCE)springer-10.1007/s10472-007-9072-3 Chomicki Jan Dept. of Computer Science and Engineering, University at Buffalo, 14260-2000, Buffalo, NY, USA aut Database querying under changing preferences [Elektronische Daten] [Jan Chomicki] We present here a formal foundation for an iterative and incremental approach to constructing and evaluating preference queries. Our main focus is query modification: a query transformation approach which works by revising the preference relation in the query. We provide a detailed analysis of the cases where the order-theoretic properties of the preference relation are preserved in the revision. We consider a number of different revision operators: union, prioritized and Pareto composition. We also formulate algebraic laws that enable incremental evaluation of preference queries. Finally, we consider two variations of the basic framework: finite restrictions of preference relations and weak-order extensions of strict partial order preference relations. Springer Science+Business Media B.V., 2007 Preference queries nationallicence Preference revision nationallicence Query evaluation nationallicence Strict partial order nationallicence Weak order nationallicence Interval order nationallicence Annals of Mathematics and Artificial Intelligence Springer Netherlands 50/1-2(2007-06-01), 79-109 1012-2443 50:1-2<79 2007 50 10472 https://doi.org/10.1007/s10472-007-9072-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10472-007-9072-3 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Chomicki Jan Dept. of Computer Science and Engineering, University at Buffalo, 14260-2000, Buffalo, NY, USA aut NATIONALLICENCE 773 0- Annals of Mathematics and Artificial Intelligence Springer Netherlands 50/1-2(2007-06-01), 79-109 1012-2443 50:1-2<79 2007 50 10472 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer